V04 DISTKIBUTION OF PLANTS IN BRITAIN. 



Bhammis catharticus, Ulex nanus, Tamus communis, Bryonia dioioa, Hottonia 

 palustris, Clilora perfoliata, Sison Amomum, Moenchia erecta, Linaria Elatine, 

 Ranunculus parviflorus, Lamium Galeobdolon, Hordeum pratense, Alopecurus 

 agrestis, Ceteracli oflicinarum, besides very local plants sucli as Cyperus longus 

 and Cicendia fllifonnis. 



3. Scottish type — species chiefly prevalent in Scotland or the north of Eng- 

 land, forming ahout l-20th of the flora, as Empetrum nigrum, Kuhus saxatilis, 

 TroUixis europseus, Geranium sylvaticum, Trientalis europjea, Hahenaria albida, 

 Haloscias sooticum, Mertensia maritima ; also Primula farinosa, Goodyera repens, 

 CoraUorhiza innata, and Saxifraga Hirculus, which are comparatively limited in 

 their distribution and partial in their localities, and which form a sort of inter- 

 mediate type ; besides some very local plants such as Arenaria norvegica, Primula 

 scotica, and Ajuga pyramidalis. 



4. Highland type — species either limited to the Scottish Highlands or extend- 

 ing to the mountains of the north of England and Wales ; a more boreal flora 

 than the last, the species being especially limited to the mountains or their 

 immediate vicinity, and forming probably about l-15th of the flora, as Azalea 

 procumbeus, Veronica alpina, Alopecures alpinus, Phleum alpinum, Junous 

 trifldus, Sibbaldia procumbens, Erigeron alpinus, Gentiana nivalis ; to these may 

 added the following, which, however, descend also lower, Salix herbacea, Silene 

 acaulis, Saxifraga stellaris, Oxyria reuiformis, Thalictrum alpinum, Luzula spicata, 

 Juncus triglumis, Eubus Chamsemorus, Epilobium alsinifoliiim, Draba incana, 

 Dryas octopetala, Alohemilla alpina, Arenaria norvegica. Primula scotica ; hlce- 

 wise some very local species, as Lychnis alpina and Oxytropis campestris. 



5. Germanic type — species chiefly seen in the east and south-east of England 

 (bounded by the German ocean eastward) — forming about l-15th or l-20th of the 

 flora, as Frankenia laevis. Anemone Pulsatilla, Reseda lutea, Silene noctiflora, Silene 

 conica, Bupleurum tenuissimum, Pimpinella magna, Pulicaria vulgaris, Lactuca 

 Scariola, Halimus pedunculatus, Aceras Anthi'opophora, Ophrys aranifera, Spartina 

 stricta ; also very local plants, such as Veronica vema. 



6. Atlantic type — species found in the west and south-west of England and 

 Wales, having a tendency to the western or Atlantic parts of the island — forming 

 about l-15th or l-20th of the flora, as Sinapis monensis, Matthiola sinuata, 

 Eaphanus maritimus, Sedum anglicum, Cotyledon Umbilicus, Eufragia viscosa, 

 Pinguicula lusitanica, Euphorbia Peplls and E. Portlandica, Scirpus Savii ; also 

 more limited species, as Sibthorpia europsea. Erica vagans, E. ciliaris, Physosper- 

 mum cornubiense, Polycarpum tetraphyllum, Adiantum CapiUus- Veneris, Cynodon 

 Dactylon. 



7. Local or doubtful type — species which cannot be referred to any of the 

 preceding types, as Potentilla rupestris, Lloydia serotina, confined to pecuhar 

 mountains in Wales, Draha aizoides and Cotoneaster vulgaris, found on the rocky 

 coasts of Wales very locally, Draba muralis and Hutchinsia petrsea ; also Brio- 

 caulon septangulare, found in the Isle of Skye, and formerly included imder Wat- 

 son's Hebridean type. 



The following are the 18 provinces, with their included counties, 

 into which Britain is divided by Watson : — 



1. Peninsula — Cornwall, Devon, Somerset. 



2. Channel — Dorset, Wilts, Isle of Wight, Hants, Sussex. 



3. Thames — Kent, Surrey, Berks, Oxford, Bucks, Middlesex, Herts, Essex. 



4. Ouse — Suffolk, Norfolk, Cambridge, Bedford, Huntingdon, Northampton. 



5. Severn — Gloucester, Worcester, Warwick, Stafl'ord, Salop, Hereford, Mon- 



mouth. 



6. South Wales — Glamorgan, Caermarthen, Pembroke, Cardigan, Brecon, Radnor. 



7. North Wales — Montgomery, Merioneth, Caernarvon, Denbigh, Flint, Anglesea. 



